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Images for responses; more images...

Audio, UC QuakeStudies

This audio file was recorded in Lyttelton. It captures the human and electronic responses following the 22nd February 2011 earthquake such as people talking, snips of radio broadcast, and alarms going off.

Articles, UC QuakeStudies

A copy of a letter from Hugo Kristinsson which was sent to Niels Holm, Official Secretary to the Governor General, on 12 August 2014. The letter was sent on behalf of Empowered Christchurch. It thanks Holm for his response to the letter Empowered Christchurch sent to the Governor General and expresses their disappointment that they have not recieved a response from the Governor General. Kristinsson also expresses his disappointment that the Governor General has not forwarded a letter sent by the Queen 'to the relevant minister'.

Research papers, University of Canterbury Library

Buildings subject to earthquake shaking will tend to move not only horizontally but also rotate in plan. In-plan rotation is known as “building torsion” and it may occur for a variety of reasons, including stiffness and strength eccentricity and/or torsional effects from ground motions. Methods to consider torsion in structural design standards generally involve analysis of the structure in its elastic state. This is despite the fact that the structural elements can yield, thereby significantly altering the building response and the structural element demands. If demands become too large, the structure may collapse. While a number of studies have been conducted into the behavior of structures considering inelastic building torsion, there appears to be no consensus that one method is better than another and as a result, provisions within current design standards have not adopted recent proposals in the literature. However, the Canterbury Earthquakes Royal Commission recently made the recommendation that provisions to account for inelastic torsional response of buildings be introduced within New Zealand building standards. Consequently, this study examines how and to what extent the torsional response due to system eccentricity may affect the seismic performance of a building and considers what a simple design method should account for. It is concluded that new methods should be simple, be applicable to both the elastic and inelastic range of response, consider bidirectional excitation and include guidance for multi-story systems.